linux-kernel - Re: [PATCH] kvm: fix boolreturn.cocci warnings

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Message-ID: <YKyjCOk2UiVQCh7m@hirez.programming.kicks-ass.net>
Date:   Tue, 25 May 2021 09:11:04 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] kvm: fix boolreturn.cocci warnings

On Tue, May 25, 2021 at 01:59:40PM +0800, kernel test robot wrote:
> From: kernel test robot <lkp@...el.com>
> 
> arch/arm64/kvm/mmu.c:1203:9-10: WARNING: return of 0/1 in function 'kvm_age_gfn' with return type bool
> arch/arm64/kvm/mmu.c:1173:9-10: WARNING: return of 0/1 in function 'kvm_set_spte_gfn' with return type bool
> arch/arm64/kvm/mmu.c:1216:9-10: WARNING: return of 0/1 in function 'kvm_test_age_gfn' with return type bool
> arch/arm64/kvm/mmu.c:1159:9-10: WARNING: return of 0/1 in function 'kvm_unmap_gfn_range' with return type bool
> 
>  Return statements in functions returning bool should use
>  true/false instead of 1/0.
> Generated by: scripts/coccinelle/misc/boolreturn.cocci

Per 2b076054e524 ("remove boolinit.cocci"), I have a very dim view of
this sort of thing.

> Fixes: 63b3f96e1a98 ("kvm: Select SCHED_INFO instead of TASK_DELAY_ACCT")

*how* ?!?